Internet isn't accessible after update

[David Ganger]

I just made a fresh install of Fedora Core 3 last night and this morning found that i couldn't access the internet. I run my internet connection through a windows system and into a switch, and it (the windows system) uses DHCP. What i found through more testing is i could ping all the computers on the lan and even sites on the internet, like google and msn. If you could help me out that would be great thanks!

-dave

On Sat, Aug 13, 2005 at 03:12:16PM -0500, David Ganger wrote:
> I just made a fresh install of Fedora Core 3 last night and this morning found that i couldn't access the internet. I run my internet connection through a windows system and into a switch, and it (the windows system) uses DHCP. What i found through more testing is i could ping all the computers on the lan and even sites on the internet, like google and msn. If you could help me out that would be great thanks!
>
> -dave

I think we need a little more clarification about what you are doing.
You imply that this used to work before update to FC3. Is this true?
What was your previous OS.

You say, " I run my internet connection through a windows system ".
Do you mean that the windows system has two interfaces and is somehow
routing packets to your FC3 system? What exactly is the configuration
of these machines.

[David Ganger]

Yes the internet did work before i used the up2date feature, It had windows 
me and i wiped that off the hard drive and installed Fedora Core 3. My 
internet connection comes into my xp machine and then is shared to all the 
other computers. So I have to nic cards one is hooked up to the cable modem, 
and the other is sent to the router, and that card is shared so others can 
access it. I hope that helps my friend helped me set it up so i am not 
totally sure of all the lingo or how much more you need to know, Thanks for 
the help.
Dave
----- Original Message ----- 
From: 
To: "For users of Fedora Core releases" 
Sent: Saturday, August 13, 2005 4:15 PM
Subject: Re: Internet isn't accessible after update
> On Sat, Aug 13, 2005 at 03:12:16PM -0500, David Ganger wrote:
> > I just made a fresh install of Fedora Core 3 last night and this morning 
> > found that i couldn't access the internet. I run my internet connection 
> > through a windows system and into a switch, and it (the windows system) 
> > uses DHCP. What i found through more testing is i could ping all the 
> > computers on the lan and even sites on the internet, like google and msn. 
> > If you could help me out that would be great thanks!
> >
> > -dave
>
> I think we need a little more clarification about what you are doing.
> You imply that this used to work before update to FC3. Is this true?
> What was your previous OS.
>
> You say, " I run my internet connection through a windows system ".
> Do you mean that the windows system has two interfaces and is somehow
> routing packets to your FC3 system? What exactly is the configuration
> of these machines.
> --
>
> =======================================================================
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> Logic is a systematic method of coming to the wrong conclusion
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On Sat, Aug 13, 2005 at 10:06:44PM -0500, David Ganger wrote:
> Yes the internet did work before i used the up2date feature, It had windows 
> me and i wiped that off the hard drive and installed Fedora Core 3. My 
> internet connection comes into my xp machine and then is shared to all the 
> other computers. So I have two nic cards one is hooked up to the cable 
> modem, and the other is sent to the router, and that card is shared so 
> others can access it. I hope that helps my friend helped me set it up so i 
> am not totally sure of all the lingo or how much more you need to know, 
> Thanks for the help.
> Dave

Well call me crazy but depending on the number of machines we are
talking about something seems backwards to me. In most cases you would
connect the router to the cable modem and all the rest of your
machines are connected to the router. Routers are designed to be
routers. You are using your XP machine as a router and XP is not
normally designed to be a router, so I assume some extra software or
configuration is required. All that is unnecessary. At home I have dsl
(but others are doing the same with cable modem service) The dsl goes
to a modem router box (but these boxes could be separate) and two
other machines are connected physically to the router. The router is
also capable of wireless routing so  a third machine (running XP by
the way) gets its internet through a wireless card.
That is the way I would  configure your system.

[Mike McCarty]

David Ganger wrote:
> ----- Original Message ----- From: 
> To: "For users of Fedora Core releases" 
> Sent: Saturday, August 13, 2005 4:15 PM
> Subject: Re: Internet isn't accessible after update
> > On Sat, Aug 13, 2005 at 03:12:16PM -0500, David Ganger wrote:
> > > I just made a fresh install of Fedora Core 3 last night and this 
> > > morning found that i couldn't access the internet. I run my internet 
> > > connection through a windows system and into a switch, and it (the 
> > > windows system) uses DHCP. What i found through more testing is i 
> > > could ping all the computers on the lan and even sites on the 
> > > internet, like google and msn. If you could help me out that would be 
> > > great thanks!
> > >
> > > -dave
> >
> > I think we need a little more clarification about what you are doing.
> > You imply that this used to work before update to FC3. Is this true?
> > What was your previous OS.
> >
> > You say, " I run my internet connection through a windows system ".
> > Do you mean that the windows system has two interfaces and is somehow
> > routing packets to your FC3 system? What exactly is the configuration
> > of these machines.
> > --
>
> Yes the internet did work before i used the up2date feature, It had
> windows me and i wiped that off the hard drive and installed Fedora Core
> 3. My internet connection comes into my xp machine and then is shared to
> all the other computers. So I have to nic cards one is hooked up to the
> cable modem, and the other is sent to the router, and that card is
> shared so others can access it. I hope that helps my friend helped me
> set it up so i am not totally sure of all the lingo or how much more you
> need to know, Thanks for the help.
> Dave

Do you really use a switch, or do you use a router? If you
really use a switch, then you need the XP machine there for
some sort of firewall. I'd suggest replacing the switch with
a router (you can get them for < $40 USD these days), and
putting the XP machine behind it. You'll likely have less
exposure that way.

If you are running a router, then it is not a normal setup.
You are using the XP machine as a bridge. My suggestion would
be to put the XP machine behind the router.

The setup I use is:

PSTN             ETH           ETH
ISP<----->ADSL Modem<------>Router<--+----->Machine 1
                                      |
                                      +----->Machine 2

This is a normal setup, and lets the router do its job.
I think that if you do it this way, you'll have more joy.

You'll need to replace the PSTN connection with your cable
connection, and the ADSL Modem with your Cable Modem.

Do you really have a switch, or d

Mike

[David Ganger]

Yeah i realize the configuration is odd but i am planning to put a small 
linux based firewall in soon, so for now i don't really want to change it, 
since i will be changing it again in the near future. Yes i was also 
mistaken it is a router not a switch. But like i said before i can ping the 
router and the xp computer and even some sites but i can't physically see 
them in a web browser. when i type in a site like www.google.com it doesn't 
do anything in the browser and just displays "done" in the bottom left hand 
corner, I have tried different web browsers and my instant messenger program 
cant connect either. Maybe i am just not understanding what you guys are 
saying. Also the internet did work fine before i performed the first 
up2date. After that i have been having these problems. It seems like some 
type of software or bug issue to me but maybe i am wrong. Thanks for all the 
help.
-Dave
----- Original Message ----- 
From: "Mike McCarty" 
To: "For users of Fedora Core releases" 
Sent: Monday, August 15, 2005 10:01 AM
Subject: Re: Internet isn't accessible after update
> David Ganger wrote:
> > ----- Original Message ----- From: 
> > To: "For users of Fedora Core releases" 
> > Sent: Saturday, August 13, 2005 4:15 PM
> > Subject: Re: Internet isn't accessible after update
> > > On Sat, Aug 13, 2005 at 03:12:16PM -0500, David Ganger wrote:
> > > > I just made a fresh install of Fedora Core 3 last night and this 
> > > > morning found that i couldn't access the internet. I run my internet 
> > > > connection through a windows system and into a switch, and it (the 
> > > > windows system) uses DHCP. What i found through more testing is i could 
> > > > ping all the computers on the lan and even sites on the internet, like 
> > > > google and msn. If you could help me out that would be great thanks!
> > > >
> > > > -dave
> > >
> > > I think we need a little more clarification about what you are doing.
> > > You imply that this used to work before update to FC3. Is this true?
> > > What was your previous OS.
> > >
> > > You say, " I run my internet connection through a windows system ".
> > > Do you mean that the windows system has two interfaces and is somehow
> > > routing packets to your FC3 system? What exactly is the configuration
> > > of these machines.
> > > --
> >
> > Yes the internet did work before i used the up2date feature, It had
> > windows me and i wiped that off the hard drive and installed Fedora Core
> > 3. My internet connection comes into my xp machine and then is shared to
> > all the other computers. So I have to nic cards one is hooked up to the
> > cable modem, and the other is sent to the router, and that card is
> > shared so others can access it. I hope that helps my friend helped me
> > set it up so i am not totally sure of all the lingo or how much more you
> > need to know, Thanks for the help.
> > Dave
>
> Do you really use a switch, or do you use a router? If you
> really use a switch, then you need the XP machine there for
> some sort of firewall. I'd suggest replacing the switch with
> a router (you can get them for < $40 USD these days), and
> putting the XP machine behind it. You'll likely have less
> exposure that way.
>
> If you are running a router, then it is not a normal setup.
> You are using the XP machine as a bridge. My suggestion would
> be to put the XP machine behind the router.
>
> The setup I use is:
>  PSTN             ETH           ETH
>
> ISP<----->ADSL Modem<------>Router<--+----->Machine 1
>                                      |
>                                      +----->Machine 2
>
> This is a normal setup, and lets the router do its job.
> I think that if you do it this way, you'll have more joy.
>
> You'll need to replace the PSTN connection with your cable
> connection, and the ADSL Modem with your Cable Modem.
>
> Do you really have a switch, or d
> Mike
>
> p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
> This message made from 100% recycled bits.
> You have found the bank of Larn.
> I can explain it for you, but I can't understand it for you.
> I speak only for myself, and I am unanimous in that!
>
> -- 
> fedora-list mailing list
> [e-mail]
> To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list

[Edward Dekkers]

David Ganger wrote:
> Yeah i realize the configuration is odd but i am planning to put a small 
> linux based firewall in soon, so for now i don't really want to change 
> it, since i will be changing it again in the near future. Yes i was also 
> mistaken it is a router not a switch. But like i said before i can ping 
> the router and the xp computer and even some sites but i can't 
> physically see them in a web browser. when i type in a site like 
> www.google.com it doesn't do anything in the browser and just displays 
> "done" in the bottom left hand corner, I have tried different web 
> browsers and my instant messenger program cant connect either. Maybe i 
> am just not understanding what you guys are saying. Also the internet 
> did work fine before i performed the first up2date. After that i have 
> been having these problems. It seems like some type of software or bug 
> issue to me but maybe i am wrong. Thanks for all the help.
> -Dave

This is very strange. The fact that you can ping sites but not get to 
them via http is crazy.

Also your set-up really makes no sense to me.

I need you to be sure of some things before we can help you. You mention 
that the Linux box goes "through" the Windows XP box.

Is this really true?

For example - is Internet Connection Sharing enabled on XP?

When you look at your network connections, does one of them say "shared"?

Could you also please provide the output of:

1> ipconfig /all on Windows.
2> ifconfig -a on Linux.
3> route -n on Linux.
4> Your router's IP address.

Regards,
Ed.

P.S. It sounds to me like up2date didn't mess this up at all, from what 
you're been posting it looks like a very wrong set-up if I understand 
you correctly, in which case I am surprised it worked at all.

[Mike McCarty]

Edward Dekkers wrote:
> David Ganger wrote:

[snip]
> This is very strange. The fact that you can ping sites but not get to 
> them via http is crazy.
>
> Also your set-up really makes no sense to me.

I said basically the same thing in politer language. But as he
seemingly has no intention of trying a more normal setup, and
I know very little about using XP in this manner, I decided
to drop out of the thread.
> I need you to be sure of some things before we can help you. You mention 
> that the Linux box goes "through" the Windows XP box.
>
> Is this really true?

I asked him this exact question, and he said yes.
> For example - is Internet Connection Sharing enabled on XP?
>
> When you look at your network connections, does one of them say "shared"?
>
> Could you also please provide the output of:
>
> 1> ipconfig /all on Windows.
> 2> ifconfig -a on Linux.
> 3> route -n on Linux.
> 4> Your router's IP address.
>
> Regards,
> Ed.
>
> P.S. It sounds to me like up2date didn't mess this up at all, from what 
> you're been posting it looks like a very wrong set-up if I understand 
> you correctly, in which case I am surprised it worked at all.

So am I. Are you really willing to try to troubleshoot his setup?

Mike

[David Ganger]

This is the ip configuration for the computer that gets the internet and 
then passes it on to the router.
Yes there is intenet connection sharing enabled.

Here is the configuration of the SHARED network connection
Address Type      Assigned by the DHCP
IP address           24.11.226.117
Subnet Mask       255.255.254.0
Default Gateway  24.11.226.1
Here is the configuration of the second network connection
Address Type      Manually configured
IP address           192.168.0.1
Subnet Mask       255.255.255.0
Default Gateway

Router ip address  192.168.0.11

----------------------------------------------------------------------------------------------------------------

On the linux computer
ifconfig -a

eth0        Link  encap:Ethernet  HWaddr  00:04:5A:8D:9F:65
              inet  addr:192.168.0.23  Bcast:192.168.0.255 
Mask:255.255.255.0
              inet6  addr:  fe80::204:5aff:fe8d:9f65/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST MTV:1500 Metric:1
              RX  packets:483  errors:0  dropped:0  overruns:0  frame:0
              TX  packets:70  errors:0  dropped:0  overruns:0  carrier:0
              collisions:0  txqueuelen:1000
              RX  bytes:141396  (138.0 KiB)  TX  bytes:6374  (6.2  KiB)
              Interrupts:11  Base  address:Ox4800

lo           Link  encap:Local  Loopback
              inet  addr:  127.0.0.1  Mask:255.0.0.0
              inet6  addr:  ::1/128  Scope:Host
              UP  LOOPBACK  RUNNING  MTU:16436  Metric:1
              RX  packets:8  errors:0  dropped:0  overruns:0  frame:0
              TX  packets:8  errors:0  dropped:0  overruns:0  carrier:0
              collisions:0  txqueuelen:0
              RX bytes: 560  (560.0  b)  TX  bytes:560  (560.0  b)

sit0         Link encap:IPv6-in-IPv4
              NOARP  MTU:1480  Metric:1
              RX  packets:0  errors:0  dropped:0  overruns:0  frame:0
              TX  packets:0  errors:0  dropped:0  overruns:0  carrier:0
              collisions:0  txqueuelen:0
              RX bytes:0  (0.0  b)  TX bytes:0  (0.0  b)

route -n
Kernel IP routing table
Destination        Gateway        Genmask                Flags        Metric 
Ref    Use    Iface
192.168.0.0      0.0.0.0           255.255.255.0      U              0 
0        0       eth0
169.254.0.0      0.0.0.0           255.255.0.0          U              0 
0        0       eth0

I hope this is everything you need, and thank you for being patient and 
helping me through this.
-Dave
----- Original Message ----- 
From: "Edward Dekkers" 
To: "For users of Fedora Core releases" 
Sent: Monday, August 15, 2005 9:17 PM
Subject: Re: Internet isn't accessible after update
> David Ganger wrote:
> > Yeah i realize the configuration is odd but i am planning to put a small
> > linux based firewall in soon, so for now i don't really want to change
> > it, since i will be changing it again in the near future. Yes i was also
> > mistaken it is a router not a switch. But like i said before i can ping
> > the router and the xp computer and even some sites but i can't
> > physically see them in a web browser. when i type in a site like
> > www.google.com it doesn't do anything in the browser and just displays
> > "done" in the bottom left hand corner, I have tried different web
> > browsers and my instant messenger program cant connect either. Maybe i
> > am just not understanding what you guys are saying. Also the internet
> > did work fine before i performed the first up2date. After that i have
> > been having these problems. It seems like some type of software or bug
> > issue to me but maybe i am wrong. Thanks for all the help.
> > -Dave
>
> This is very strange. The fact that you can ping sites but not get to
> them via http is crazy.
>
> Also your set-up really makes no sense to me.
>
> I need you to be sure of some things before we can help you. You mention
> that the Linux box goes "through" the Windows XP box.
>
> Is this really true?
>
> For example - is Internet Connection Sharing enabled on XP?
>
> When you look at your network connections, does one of them say "shared"?
>
> Could you also please provide the output of:
>
> 1> ipconfig /all on Windows.
> 2> ifconfig -a on Linux.
> 3> route -n on Linux.
> 4> Your router's IP address.
>
> Regards,
> Ed.
>
> P.S. It sounds to me like up2date didn't mess this up at all, from what
> you're been posting it looks like a very wrong set-up if I understand
> you correctly, in which case I am surprised it worked at all.

--------------------------------------------------------------------------------
> -- 
> fedora-list mailing list
> [e-mail]
> To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list

[Garry Harthill]

On 16/08/05, David Ganger  wrote:
> This is the ip configuration for the computer that gets the internet and
> then passes it on to the router.
> Yes there is intenet connection sharing enabled.
>
> Here is the configuration of the SHARED network connection
> Address Type      Assigned by the DHCP
> IP address           24.11.226.117
> Subnet Mask       255.255.254.0
> Default Gateway  24.11.226.1
> Here is the configuration of the second network connection
> Address Type      Manually configured
> IP address           192.168.0.1
> Subnet Mask       255.255.255.0
> Default Gateway
>
> Router ip address  192.168.0.11
>
> On the linux computer
> ifconfig -a
>
> eth0        Link  encap:Ethernet  HWaddr  00:04:5A:8D:9F:65
>               inet  addr:192.168.0.23  Bcast:192.168.0.255
> Mask:255.255.255.0
>               inet6  addr:  fe80::204:5aff:fe8d:9f65/64 Scope:Link
>               UP BROADCAST RUNNING MULTICAST MTV:1500 Metric:1
>               RX  packets:483  errors:0  dropped:0  overruns:0  frame:0
>               TX  packets:70  errors:0  dropped:0  overruns:0  carrier:0
>               collisions:0  txqueuelen:1000
>               RX  bytes:141396  (138.0 KiB)  TX  bytes:6374  (6.2  KiB)
>               Interrupts:11  Base  address:Ox4800
>
> lo           Link  encap:Local  Loopback
>               inet  addr:  127.0.0.1  Mask:255.0.0.0
>               inet6  addr:  ::1/128  Scope:Host
>               UP  LOOPBACK  RUNNING  MTU:16436  Metric:1
>               RX  packets:8  errors:0  dropped:0  overruns:0  frame:0
>               TX  packets:8  errors:0  dropped:0  overruns:0  carrier:0
>               collisions:0  txqueuelen:0
>               RX bytes: 560  (560.0  b)  TX  bytes:560  (560.0  b)
>
> sit0         Link encap:IPv6-in-IPv4
>               NOARP  MTU:1480  Metric:1
>               RX  packets:0  errors:0  dropped:0  overruns:0  frame:0
>               TX  packets:0  errors:0  dropped:0  overruns:0  carrier:0
>               collisions:0  txqueuelen:0
>               RX bytes:0  (0.0  b)  TX bytes:0  (0.0  b)
>
> route -n
> Kernel IP routing table
> Destination        Gateway        Genmask                Flags        Metric
> Ref    Use    Iface
> 192.168.0.0      0.0.0.0           255.255.255.0      U              0
> 0        0       eth0
> 169.254.0.0      0.0.0.0           255.255.0.0          U              0
> 0        0       eth0

I don't understand why you have a router behind your windows xp box.
Both of the router interfaces are on the same network. No routing is
necessary here. Your windows box - in essence is acting as a router
because it is multi-homed running ICS. Get rid of the router and use a
switch or a cross-over patch cable to your linux box. Then make sure
the linux box has a default gateway of 192.168.0.1

[Kevin Cummings]

David Ganger wrote:
> This is the ip configuration for the computer that gets the internet and 
> then passes it on to the router.
> Yes there is intenet connection sharing enabled.
>
> Here is the configuration of the SHARED network connection
> Address Type      Assigned by the DHCP
> IP address           24.11.226.117
> Subnet Mask       255.255.254.0
> Default Gateway  24.11.226.1
> Here is the configuration of the second network connection
> Address Type      Manually configured
> IP address           192.168.0.1
> Subnet Mask       255.255.255.0
> Default Gateway
>
> Router ip address  192.168.0.11
>
> On the linux computer
> ifconfig -a
>
> eth0        Link  encap:Ethernet  HWaddr  00:04:5A:8D:9F:65
>              inet  addr:192.168.0.23  Bcast:192.168.0.255 
> Mask:255.255.255.0
>              inet6  addr:  fe80::204:5aff:fe8d:9f65/64 Scope:Link
>              UP BROADCAST RUNNING MULTICAST MTV:1500 Metric:1
>              RX  packets:483  errors:0  dropped:0  overruns:0  frame:0
>              TX  packets:70  errors:0  dropped:0  overruns:0  carrier:0
>              collisions:0  txqueuelen:1000
>              RX  bytes:141396  (138.0 KiB)  TX  bytes:6374  (6.2  KiB)
>              Interrupts:11  Base  address:Ox4800
>
> lo           Link  encap:Local  Loopback
>              inet  addr:  127.0.0.1  Mask:255.0.0.0
>              inet6  addr:  ::1/128  Scope:Host
>              UP  LOOPBACK  RUNNING  MTU:16436  Metric:1
>              RX  packets:8  errors:0  dropped:0  overruns:0  frame:0
>              TX  packets:8  errors:0  dropped:0  overruns:0  carrier:0
>              collisions:0  txqueuelen:0
>              RX bytes: 560  (560.0  b)  TX  bytes:560  (560.0  b)
>
> sit0         Link encap:IPv6-in-IPv4
>              NOARP  MTU:1480  Metric:1
>              RX  packets:0  errors:0  dropped:0  overruns:0  frame:0
>              TX  packets:0  errors:0  dropped:0  overruns:0  carrier:0
>              collisions:0  txqueuelen:0
>              RX bytes:0  (0.0  b)  TX bytes:0  (0.0  b)
>
> route -n
> Kernel IP routing table
> Destination        Gateway        Genmask                Flags        
> Metric Ref    Use    Iface
> 192.168.0.0      0.0.0.0           255.255.255.0      U              0 
> 0        0       eth0
> 169.254.0.0      0.0.0.0           255.255.0.0          U              0 
> 0        0       eth0

You don't have a DEFAULT route in your routing table.  Your Linux 
computer can ping local machines (on the 192.168.0 network), including 
your router, but doesn't know what to do with packets destined for 
beyond your local network.  You need a route like:

default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0

the command:

route add default gw 192.168.0.1 dev eth0

should do it for you, but it belongs in /etc/sysconfig/network as:

GATEWAY=192.168.0.1
GATEWAYDEV=eth0